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[1ST YEAR] PH 105 - Pharmaceutical Analysis I (Lec) > MIDTERM 02 - Redox Titrations > Flashcards

MIDTERM 02 - Redox Titrations Flashcards

1
Q

Reactions that involve transfer of electrons; occurs between a reducing and oxidizing agent

A

Redox reactions

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2
Q

A strong oxidizing agent with an intense violet color

A

Potassium permanganate

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3
Q

Type of titration - Standardization of 0.1 N KMnO4

A

Direct titration

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4
Q

Type of reaction - Standardization of 0.1 N KMnO4

A

Redox reaction

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5
Q

Analyte/reducing agent - Standardization of 0.1 N KMnO4

A

Sodium oxalate (Na2C2O4)

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6
Q

Titrant/oxidizing agent - Standardization of 0.1 N KMnO4

A

Potassium permanganate (KMnO4)

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7
Q

Acidifying agent - Standardization of 0.1 N KMnO4

A

Sulfuric acid (H2SO4)

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8
Q

Factor of analyte - Standardization of 0.1 N KMnO4

A

2

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9
Q

Indicator -Standardization of 0.1 N KMnO4

A

None (KMnO4 is a self-indicator)

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10
Q

Color transition - Standardization of 0.1 N KMnO4

A

Colorless to pale pink

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11
Q

Used as a reducing agent; it is a colorless acid

A

Oxalic acid

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12
Q

Is a mild, fast acting, oxidizing germicide

A

Hydrogen peroxide topical solution USP

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13
Q

Type of titration - Assay of hydrogen peroxide (H2O2)

A

Direct titration

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14
Q

Analyte - Assay of hydrogen peroxide (H2O2)

A

Hydrogen peroxide (H2O2)

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15
Q

Titrant - Assay of hydrogen peroxide (H2O2)

A

Potassium permanganate (KMnO4)

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16
Q

Acidifying agent - Assay of hydrogen peroxide (H2O2)

A

Sulfuric acid (H2SO4)

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17
Q

Factor of analyte - Assay of hydrogen peroxide (H2O2)

A

2

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18
Q

Type of titration - Assay of cherry juice for malic acid (C4H6O5)

A

Indirect titration

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19
Q

Type of reaction - Assay of cherry juice for malic acid (C4H6O5)

A

Redox reaction

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20
Q

Analyte/reducing agent - Assay of cherry juice for malic acid (C4H6O5)

A

Malic acid (C4H6O5)

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21
Q

Titrant/oxidizing agent - Assay of cherry juice for malic acid (C4H6O5)

A

Potassium permanganate (KMnO4)

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22
Q

Acidifying agent - Assay of cherry juice for malic acid (C4H6O5)

A

Sulfuric acid (H2SO4)

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23
Q

Type of titration - Assay of sodium nitrite (NaNO2)

A

Double residual titration

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24
Q

Type of reaction - Assay of sodium nitrite (NaNO2)

A

Redox reaction

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25
Q

Analyte/reducing agent - Assay of sodium nitrite (NaNO2)

A

Sodium nitrite (NaNO2)

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26
Q

Excess titrant/oxidizing agent - Assay of sodium nitrite (NaNO2)

A

Potassium permanganate (KMnO4)

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27
Q

Acidifying agent - Assay of sodium nitrite (NaNO2)

A

Sulfuric acid (H2SO4)

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28
Q

Backtitrant/reducing agent - Assay of sodium nitrite (NaNO2)

A

Oxalic acid (H2C2O4)

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29
Q

Factor of analyte - Assay of sodium nitrite (NaNO2)

A

2

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30
Q

Precipitated calcium carbonate - type of titration (Permanganometry)

A

Indirect titration

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31
Q

Precipitated manganese dioxide - type of titration (Permanganometry)

A

Indirect titration

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32
Q

Dibasic calcium phosphate - type of titration (Permanganometry)

A

Indirect titration

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33
Q

Titanium dioxide (with blank determination) - type of titration (Permanganometry)

A

Indirect titration

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34
Q

Potassium permanganate tablets - type of titration (Permanganometry)

A

Residual titration

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35
Q

Lead oxide (with preliminary treatment) - type of titration (Permanganometry)

A

Residual titration

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36
Q

Strong oxidizing agent and considerably more stable than KMnO4 in acid medium

A

Cerium (IV) sulfate [Ce(SO4)2]

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37
Q

Used as an indicator in cerimetry

A

Orthophenanthroline TS

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38
Q

Acidifying medium - Standardization of 0.1 N Ce(SO4)2

A

Sulfuric acid (H2SO4) and hydrochloric acid (HCl)

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39
Q

Primary standard - Standardization of 0.1 N Ce(SO4)2

A

Sodium oxalate (Na2C2O4)

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40
Q

Heat requirement - Standardization of 0.1 N Ce(SO4)2

A

70°-75°C

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41
Q

Heat requirement - Standardization of 0.1 N KMnO4

A

60°-70°C

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42
Q

Type of titration - Standardization of 0.1 N Ce(SO4)2

A

Direct titration

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43
Q

Color transition - Standardization of 0.1 N Ce(SO4)2

A

Colorless to pale yellow

44
Q

Factor of analyte - Standardization of 0.1 N Ce(SO4)2

A

2

45
Q

Type of reaction - Assay of ferrous sulfate tablets (FeSO4.7H2O)

A

Redox reaction

46
Q

Type of titration - Assay of ferrous sulfate tablets (FeSO4.7H2O)

A

Direct titration

47
Q

Indicator - Assay of ferrous sulfate tablets (FeSO4.7H2O)

A

Orthophenanthroline TS

48
Q

Color transition - Assay of ferrous sulfate tablets (FeSO4.7H2O)

A

Colorless to permanent pink color

49
Q

Factor of analyte - Assay of ferrous sulfate tablets (FeSO4.7H2O)

A

1

50
Q

Ferrous sulfate - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

51
Q

Ferrous fumarate - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

52
Q

Ferrous gluconate oral solution - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

53
Q

Ferrous gluconate tablets (with preliminary treatment) - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

54
Q

Hydroquinone - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

55
Q

Menadione - type of titration (Cerimetry)

A

Direct titration (w/ blank determination)

56
Q

Ringer’s solution for KCl content - type of titration (Cerimetry)

A

Residual titration

57
Q

Direct titration of reducing substances using iodine (I2) as volumetric standard

A

Iodimetry

58
Q

Indirect titration of oxidizing substances reduced by excess iodide to liberate I2

A

Iodometry

59
Q

Indicator of choice in iodimetry and iodometry because it forms an intense blue complex with iodine

A

Starch

60
Q

2 types of starch

A

Soluble starch, Insoluble starch

61
Q

includes β-amylose

A

Soluble starch

62
Q

Includes α-amylose and amylopectin

A

Insoluble starch

63
Q

Is a molecule of repeating sugar units joined by α-1,4 linkage

A

Amylose

64
Q

Has both α-1,4-glycosidic bonds and α-1,6 bonds to branches

A

Amylopectin

65
Q

Iodimetry or iodometry - Standardization of 0.1 N Iodine (I2)

A

Iodimetry

66
Q

Type of chemical reaction - Standardization of 0.1 N Iodine (I2)

A

Redox reaction

67
Q

Factor - Standardization of 0.1 N Iodine (I2)

A

2

68
Q

Type of titration - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Direct iodometry

69
Q

Type of reaction -Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Redox reaction

70
Q

Analyte/oxidizing agent - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Potassium dichromate (K2Cr2O7)

71
Q

Titrant/reducing agent - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Sodium thiosulfate (Na2S2O3)

72
Q

Acidifying agent - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Hydrochloric acid (HCl)

73
Q

Reducing agent for K2Cr2O7 - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Potassium iodide (KI)

74
Q

Indicator - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Starch TS

75
Q

Color transition - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

Blue to colorless

76
Q

Factor - Standardization of 0.1 N sodium thiosulfate (Na2S2O3)

A

6

77
Q

Antimony potassium tartrate - type of titration (Iodimetry)

A

Direct titration

78
Q

Antimony potassium tartrate - Iodimetry or Iodometry

A

Iodimetry

79
Q

Dimercaprol - type of titration (Iodimetry)

A

Direct titration

80
Q

Dimercaprol - Iodimetry or Iodometry

A

Iodimetry

81
Q

Sodium ascorbate - type of titration (Iodimetry)

A

Direct titration

82
Q

Sodium ascorbate - Iodimetry or Iodometry

A

Iodimetry

83
Q

Sodium thiosulfate - type of titration (Iodimetry)

A

Direct titration

84
Q

Sodium thiosulfate - Iodimetry or Iodometry

A

Iodimetry

85
Q

Sulfur dioxide - type of titration (Iodimetry)

A

Direct titration

86
Q

Sulfur dioxide - Iodimetry or Iodometry

A

Iodimetry

87
Q

Isoniazid - type of titration (Iodimetry)

A

Residual titration

88
Q

Isoniazid - Iodimetry or Iodometry

A

Iodimetry

89
Q

Mild mercurous chloride - type of titration (Iodimetry)

A

Residual titration

90
Q

Mild mercurous chloride - Iodimetry or Iodometry

A

Iodimetry

91
Q

Methionine - type of titration (Iodimetry)

A

Residual titration

92
Q

Methionine - Iodimetry or Iodometry

A

Iodimetry

93
Q

Arsanilic acid - type of titration (Iodometry)

A

Direct titration

94
Q

Arsanilic acid - Iodimetry or Iodometry

A

Iodometry

95
Q

Chromic chloride - type of titration (Iodometry)

A

Direct titration

96
Q

Chromic chloride - Iodimetry or Iodometry

A

Iodometry

97
Q

Cupric sulfate (with blank determination) - type of titration (Iodometry)

A

Direct titration

98
Q

Cuprous sulfate (with blank determination) - Iodimetry or Iodometry

A

Iodometry

99
Q

Selenium sulfide (with blank determination) - type of titration (Iodometry)

A

Direct titration

100
Q

Selenium sulfide (with blank determination) - Iodimetry or Iodometry

A

Iodometry

101
Q

Sodium hypochlorite solution - type of titration (Iodometry)

A

Direct titration

102
Q

Sodium hypochlorite solution - Iodimetry or Iodometry

A

Iodometry

103
Q

Thyroid - type of titration (Iodometry)

A

Direct titration

104
Q

Thyroid - Iodimetry or Iodometry

A

Iodometry

105
Q

Sodium borohydride - type of titration (Iodometry)

A

Residual titration

106
Q

Sodium borohydride - Iodimetry or Iodometry

A

Iodometry

[1ST YEAR] PH 105 - Pharmaceutical Analysis I (Lec) (12 decks)

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